A horrifying story about a french serial killer, Dr. Marcel Petiot, who operated before and during WW2.

He pretended to help people escape France but then killed them instead. He was caught be the Gestapo and tortured but refused to confess and pretended to be a resistance member. At least one real resistance members believed him and it hampered his trial but he was eventually executed.

Commissaire Georges-Victor Massu, a 33-year police veteran with more than 3,200 arrests to his credit, immediately took charge of the case. Examining the death house, he noted basement sinks large enough for draining corpses of blood, and a soundproof octagonal chamber with wall-mounted shackles, a peephole centered in its door. Massu was still on the scene at 1:30 a.m., when a telegram arrived from Paris police headquarters. It read: “Order from German authorities. Arrest Petiot. Dangerous lunatic.”